package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.utils.AliOssUtilDelete;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @author majun
 * @package sky-take-out
 * @date 2024/5/12 : 上午9:13
 */
@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private AliOssUtilDelete aliOssUtilDelete;

    /**
     * 新增菜品和对应口味
     *
     * @param dishDTO
     */
    @Override
    @Transactional //保证方法的原子性 要么全成功要么全失败
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品表插入一条数据
        dishMapper.insert(dish);

        Long dishId = dish.getId();
        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //遍历赋值
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //sql批量插入
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {

        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 根据id删除菜品
     *
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否存在起售中
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);

            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品起售中不能处理
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断当前是否被套餐关联
        List<Long> setmealIdsByDishIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIdsByDishIds != null && setmealIdsByDishIds.size() > 0) {
            //当前菜品被套餐关联，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除aliOss图片

        for (Long id : ids) {
            //获取菜品图片url 删除aliOss中菜品图片
            Dish dish = dishMapper.getById(id);
            String url = dish.getImage();
            String image = url.substring(url.lastIndexOf("/") + 1);
            aliOssUtilDelete.delete(image);

            //删除菜品表中菜品
            dishMapper.DeleteById(id);

            //删除口味表中菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);

        }


    }

    /**
     * 根据id查询菜品和对应口味数据
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {

        //先查询菜品表
        Dish byId = dishMapper.getById(id);

        //再查询口味表
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        //最后封装数据
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(byId, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 修改菜品基本信息和口味信息
     *
     * @param dishDTO
     */
    @Override
    @Transactional
    public void upDateWhitFlavor(DishDTO dishDTO) {

        //修改菜品表
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.upDate(dish);

        //修改口味表 覆盖（先删除后插入数据）
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //批量插入
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 菜品起售、停售
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {

        Dish build = Dish.builder()
                .status(status)
                .id(id)
                .build();

        dishMapper.upDate(build);

    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {

        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;

    }

}
